If you were to take a #2 graphite pencil and color over the markings, this will make them appear and easier to read. Even with my glasses it is difficult. It does, to me, appear to be Russian or Slavic.
Since this thread began I have been looking in the Encyclopedia of Hand Guns by Zhuk, and found similar looking pieces, but none match exactly as this one. Maybe the other side will reveal a charecteristic that is recognizable
OTHER SIDE: Nope: Don't have the foggiest.